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Old 11-29-2008, 12:22 PM
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NOL4154 NOL4154 is offline
Amateur Metal Finisher
 
Join Date: Nov 2008
Location: Tucson,Az
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Thumbs up Re: Removing triple plated chrome

As a chemist, better living through chemistry!

You need to remove plating with chemistry. Caswell sells chemical strippers, use them.
1. Chrome- 30 % Murtaic acid.
2. Nickel- Caswell nickel stripper.
3. Copper-Caswell copper stripper.

Trying to remove plating with buffs can damage and deform aluminum.
Now removing plating from aluminum with chemical strippers, yes you can with the right chemicals. These chemicals are formulated with buffers to protect base materials. Inaddition, after you remove plating, you need to polish good, then add a good layer of copper, repolish again, add other layer of copper. Aluminum is not a very forgiving material. I known, I have over 25 years of plating experince plating all tyoes of base material.
Good Luck,
Nol4254

I'm trying to strip chrome, nickel and copper of a cast aluminum part with a sisal wheel and greaseless compound #80. The process is very slow going. When I do finally get to the copper/aluminum layer the surface is uneven. Alot of heat is generated in the part. Overall I'm not happy with the progress.
I've tried sandblasting, but it is very slow too with my sandblaster. I can't strip chemically because it will attack the zinc in the part. Any suggestions?

Vitals
new 8x1/2 sisal wheels, raked to eliminate loose pieces.
1 HP bench grinder
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